Specify the display dim brightness (plugged in)

Supported on: At least Windows Server 2008 R2 or Windows 7

Registry

HKLM Software\Policies\Microsoft\Power\PowerSettings\f1fbfde2-a960-4165-9f88-50667911ce96

Options

ACSettingIndex decimal - range ?-100

Description

This policy setting allows you to specify the brightness of the display when Windows automatically reduces brightness of the display. If you enable this policy setting, you must provide a value, in percentage, indicating the display brightness when Windows automatically reduces brightness of the display. If you disable or do not configure this policy setting, users control this setting.